Current methods of shade matching in dentistry: a review of the supporting literature.

UNLABELLED: The difficulties of shade matching in dentistry are discussed and various suggestions are given to improve the process. Several authors have described shade-taking routines with the aim of improving shade-matching. These are summarized and a method for choosing the appropriate shade from the previous guidelines is given. The scientific principles and evidence-base behind the new technique are given. The problems and advantages of instrumental shade-taking devices are reviewed. CLINICAL RELEVANCE: Consistent and correct shade selection is fundamental to the placement of aesthetic restorations which are an essential part of everyday practice.